/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --surface-hover: #1e1e35;
  --accent: #5b8def;
  --accent-dim: rgba(91, 141, 239, 0.2);
  --accent-glow: rgba(91, 141, 239, 0.35);
  --text: #e8e8ed;
  --text-dim: #8888a0;
  --radius: 10px;
}

html {
  color-scheme: dark;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== Header ===== */
.site-header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.site-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-header .subtitle {
  color: var(--text-dim);
  font-size: 1rem;
  margin-top: 0.25rem;
}

/* ===== Player Section ===== */
.player-section {
  max-width: 1100px;
  margin: 0 auto 3rem;
  padding: 0 1rem;
}

/* ===== Player Wrapper ===== */
.player-wrapper {
  position: relative;
}

/* ===== Video Player (responsive 16:9) ===== */
.video-player {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
  background: #000;
}

.video-player iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* ===== Kp Timeline Bar ===== */
.kp-bar {
  display: flex;
  width: 100%;
  height: 28px;
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.kp-bar.empty {
  background: var(--surface);
}

.kp-bar .kp-segment {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  transition: opacity 0.15s ease;
}

.kp-bar .kp-segment .kp-label {
  position: relative;
  z-index: 1;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.kp-bar .kp-segment .kp-time {
  position: absolute;
  bottom: 1px;
  font-size: 0.5rem;
  font-weight: 400;
  opacity: 0;
  color: rgba(255, 255, 255, 0.7);
  transition: opacity 0.15s ease;
}

.kp-bar .kp-segment:hover .kp-time {
  opacity: 1;
}

/* Kp colour scale: green (quiet) -> yellow -> orange -> red -> purple (extreme) */
.kp-bar .kp-segment[data-level="0"] { background: #1a5c2a; }
.kp-bar .kp-segment[data-level="1"] { background: #2d7a3a; }
.kp-bar .kp-segment[data-level="2"] { background: #4a8c3f; }
.kp-bar .kp-segment[data-level="3"] { background: #8a9a2f; }
.kp-bar .kp-segment[data-level="4"] { background: #c49b1a; }
.kp-bar .kp-segment[data-level="5"] { background: #d4701a; }
.kp-bar .kp-segment[data-level="6"] { background: #c0392b; }
.kp-bar .kp-segment[data-level="7"] { background: #8e44ad; }
.kp-bar .kp-segment[data-level="8"] { background: #6c3483; }
.kp-bar .kp-segment[data-level="9"] { background: #4a235a; }

/* ===== Video Meta ===== */
.video-meta {
  margin-top: 1rem;
}

.video-meta h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.video-meta .date {
  color: var(--accent);
  font-size: 0.95rem;
  margin-top: 0.2rem;
}

.video-meta .weather,
.video-meta .sun,
.video-meta .aurora,
.video-meta .duration,
.video-meta .tags {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

.video-meta .tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-right: 0.25rem;
}

/* ===== Calendar Section ===== */
.calendar-section {
  max-width: 1100px;
  margin: 0 auto 4rem;
  padding: 0 1rem;
}

/* Header row: nav + filters */
.calendar-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

/* Navigation */
.calendar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.calendar-nav h2 {
  font-size: 1.25rem;
  font-weight: 600;
  min-width: 200px;
  text-align: center;
}

.calendar-nav button {
  background: var(--surface);
  border: 1px solid transparent;
  color: var(--text);
  font-size: 1.2rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.calendar-nav button:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.calendar-nav button:disabled {
  opacity: 0.25;
  cursor: default;
}

/* ===== Filters ===== */
.filters {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid transparent;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.filter-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Weekday headers */
.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}

.calendar-weekday {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.4rem 0;
}

/* Grid */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-day {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--surface);
  position: relative;
  font-size: 0.9rem;
  color: var(--text-dim);
  overflow: hidden;
  transition: all 0.15s ease;
}

.calendar-day.empty {
  background: transparent;
}

.calendar-day.today {
  box-shadow: inset 0 0 0 2px var(--accent);
}

/* Days with videos */
.calendar-day.has-video {
  cursor: pointer;
  border: 1px solid var(--accent-dim);
}

.calendar-day.has-video:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: scale(1.06);
  z-index: 2;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Selected day */
.calendar-day.selected {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px var(--accent), 0 4px 16px rgba(91, 141, 239, 0.3);
  z-index: 3;
}

.calendar-day.selected .thumb img {
  opacity: 0.7;
}

/* Filtered-out days */
.calendar-day.filtered-out {
  opacity: 0.2;
  cursor: default;
  pointer-events: none;
}

.calendar-day .thumb {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.calendar-day .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  transition: opacity 0.15s ease;
}

.calendar-day.has-video:hover .thumb img {
  opacity: 0.6;
}

.calendar-day .date-number {
  position: relative;
  z-index: 1;
  font-weight: 600;
  color: var(--text);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--accent-dim);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .site-header h1 {
    font-size: 1.5rem;
  }

  .calendar-header-row {
    flex-direction: column;
    align-items: stretch;
  }

  .calendar-nav {
    justify-content: center;
  }

  .filters {
    justify-content: center;
  }

  .calendar-grid {
    gap: 2px;
  }

  .calendar-weekdays {
    gap: 2px;
  }

  .calendar-day {
    font-size: 0.75rem;
    border-radius: 6px;
    aspect-ratio: 1;
  }

  .calendar-day .thumb {
    display: none;
  }

  .calendar-day.has-video::after {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    position: absolute;
    bottom: 4px;
  }

  .calendar-nav h2 {
    font-size: 1rem;
    min-width: 160px;
  }
}